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      <title>Mybatis的常用标签? - 交互式测验</title>
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    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>Mybatis的常用标签? - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
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                    <div id="question-container">
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      <script>
        const quizData = [
  {
    "question": "在MyBatis的<insert>标签中，如果希望数据库自动生成主键，并将生成的主键值回填到传入的Java对象中，应该使用哪一组属性？",
    "options": [
      "resultType=\"int\" 和 parameterType=\"User\"",
      "useGeneratedKeys=\"true\" 和 keyProperty=\"id\"",
      "id=\"insertUser\" 和 collection=\"list\"",
      "test=\"id != null\" 和 item=\"user\""
    ],
    "correctAnswerIndex": 1,
    "explanation": "useGeneratedKeys=\"true\" 属性用于启用数据库的自动主键生成功能。keyProperty=\"id\" 属性则指定了MyBatis应将生成的主键值设置到传入参数对象（例如User对象）的哪个属性上（这里是'id'属性）。这两个属性通常需要配合使用以实现主键回填。",
    "source": "文档中「1.2 <insert>」部分",
    "hint": "文档中提到，一个属性用于“启用”主键自动生成，另一个属性用于指定主键应映射到Java对象的哪个“属性名”。"
  },
  {
    "question": "在构建动态更新语句时，使用<set>标签相比于多个<if>标签直接拼接SQL，其主要优势是什么？",
    "options": [
      "它可以根据条件自动添加WHERE关键字。",
      "它可以迭代一个集合，实现批量更新。",
      "它可以自动处理并移除SET子句中可能多余的末尾逗号。",
      "它可以定义数据库列名和Java对象属性之间的映射关系。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "<set>标签的主要功能是智能地处理动态UPDATE语句。它会自动在需要时添加SET关键字，并且更重要的是，它会自动移除其内部生成的SQL片段末尾多余的逗号，从而避免了因最后一个<if>条件不满足而导致的SQL语法错误。",
    "source": "文档中「2.3 <trim>、<where>、<set>」部分",
    "hint": "思考一下，如果在一个UPDATE语句中动态地设置字段，当最后一个条件不满足时，SQL语句的末尾会留下什么？<set>标签正是为了解决这个问题。"
  },
  {
    "question": "当需要根据传入的参数值从多个互斥的条件中选择一个来构建SQL时，类似于Java的switch语句，应该使用哪组标签？",
    "options": [
      "<if> 和 <else>",
      "<sql> 和 <include>",
      "<foreach>, <when>, <otherwise>",
      "<choose>, <when>, <otherwise>"
    ],
    "correctAnswerIndex": 3,
    "explanation": "<choose>标签包裹了整个逻辑块。内部的<when>标签提供了多个条件分支（类似于case），MyBatis会选择第一个满足test条件的<when>。如果所有<when>都不满足，则会执行<otherwise>中的内容（类似于default）。这套组合完美实现了“多选一”的逻辑。",
    "source": "文档中「2.2 <choose>、<when>、<otherwise>」部分",
    "hint": "文档明确指出，这组标签的用途“类似于 Java 中的 switch 语句”。"
  },
  {
    "question": "为了实现SQL代码的复用，例如将一组常用的查询字段定义在一个地方，然后在多个查询语句中引用它，应该使用哪一对标签组合？",
    "options": [
      "<resultMap> 和 <result>",
      "<select> 和 <selectKey>",
      "<sql> 和 <include>",
      "<trim> 和 <set>"
    ],
    "correctAnswerIndex": 2,
    "explanation": "使用<sql>标签可以定义一个可重用的SQL片段，并为其指定一个唯一的id。然后，在任何需要该片段的地方，通过<include>标签并使用refid属性引用这个id，即可将该SQL片段插入到当前位置，从而有效减少代码重复，提高可维护性。",
    "source": "文档中「3.3 <sql> 和 <include>」部分",
    "hint": "文档中描述了“定义可重用的 SQL 片段”的场景，其中一个标签用于“定义”，另一个用于“引入”。"
  },
  {
    "question": "在MyBatis中，<resultMap>标签最核心的应用场景是什么？",
    "options": [
      "用于动态生成复杂的WHERE条件子句。",
      "用于对传入的集合参数进行迭代，以支持批量操作。",
      "用于处理数据库表字段名与Java对象属性名不一致的情况。",
      "用于指定查询操作返回结果的Java类型，例如'User'。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "虽然resultType可以处理大部分简单的映射，但当数据库表的列名（如 user_name）和Java对象的属性名（如 userName）不匹配时，<resultMap>就派上了用场。它提供了详细的映射规则，可以精确地将每一列映射到对应的属性上，是处理复杂结果映射的关键。",
    "source": "文档中「3.2 <resultMap>」部分 和 「3. 结果映射处理」部分",
    "hint": "这个标签的用途在于解决“字段与属性名称不一致”的问题，从而实现复杂的映射。"
  },
  {
    "question": "当需要执行一个批量查询，例如 `SELECT * FROM users WHERE id IN (1, 2, 3)`，并且ID列表是动态传入的时，哪个MyBatis标签是最佳选择？",
    "options": [
      "<if test=\"ids != null\">",
      "<where>",
      "<foreach>",
      "<choose>"
    ],
    "correctAnswerIndex": 2,
    "explanation": "<foreach>标签专门用于迭代集合类型的参数（如List、Array），并动态生成SQL。通过设置其collection, item, open, close, separator等属性，可以非常方便地构建出IN (...)这样的批量查询子句，是处理批量操作的首选方案。",
    "source": "文档中「3.1 <foreach>」部分 和 「2. 批量操作」部分",
    "hint": "文档中有一个标签专门“用于迭代集合类型参数，构建批量处理 SQL”。"
  },
  {
    "question": "在<select>标签中，`resultType` 和 `resultMap` 两个属性的作用是什么？",
    "options": [
      "`resultType`指定输入参数类型，`resultMap`指定输出参数类型。",
      "`resultType`用于简单的自动映射，`resultMap`用于复杂的自定义映射。",
      "两者功能相同，`resultMap`是`resultType`的别名。",
      "`resultType`用于单条记录返回，`resultMap`用于多条记录返回。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "`resultType`用于指定一个简单的Java类型，MyBatis会尝试自动将查询结果的列名匹配到该类型的属性上。而`resultMap`则引用一个预先定义好的<resultMap>标签，用于处理列名与属性名不匹配或更复杂的关联查询等自定义映射场景。通常情况下，两者只使用其一。",
    "source": "文档中「1.1 <select>」和「3.2 <resultMap>」部分",
    "hint": "一个属性用于指定返回结果的Java类型，另一个用于指定一个自定义的结果映射规则。"
  }
];
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        let score = 0;
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            document.getElementById('quiz-footer').style.display = 'none';

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            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

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                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
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            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  